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<a name="ARC-SIMD-Built_002din-Functions"></a>
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<hr>
<a name="ARC-SIMD-Built_002din-Functions-1"></a>
<h4 class="subsection">6.60.5 ARC SIMD Built-in Functions</h4>

<p>SIMD builtins provided by the compiler can be used to generate the
vector instructions.  This section describes the available builtins
and their usage in programs.  With the <samp>-msimd</samp> option, the
compiler provides 128-bit vector types, which can be specified using
the <code>vector_size</code> attribute.  The header file <samp>arc-simd.h</samp>
can be included to use the following predefined types:
</p><div class="example">
<pre class="example">typedef int __v4si   __attribute__((vector_size(16)));
typedef short __v8hi __attribute__((vector_size(16)));
</pre></div>

<p>These types can be used to define 128-bit variables.  The built-in
functions listed in the following section can be used on these
variables to generate the vector operations.
</p>
<p>For all builtins, <code>__builtin_arc_<var>someinsn</var></code>, the header file
<samp>arc-simd.h</samp> also provides equivalent macros called
<code>_<var>someinsn</var></code> that can be used for programming ease and
improved readability.  The following macros for DMA control are also
provided:
</p><div class="example">
<pre class="example">#define _setup_dma_in_channel_reg _vdiwr
#define _setup_dma_out_channel_reg _vdowr
</pre></div>

<p>The following is a complete list of all the SIMD built-ins provided
for ARC, grouped by calling signature.
</p>
<p>The following take two <code>__v8hi</code> arguments and return a
<code>__v8hi</code> result:
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vaddaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vaddw (__v8hi, __v8hi);
__v8hi __builtin_arc_vand (__v8hi, __v8hi);
__v8hi __builtin_arc_vandaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vavb (__v8hi, __v8hi);
__v8hi __builtin_arc_vavrb (__v8hi, __v8hi);
__v8hi __builtin_arc_vbic (__v8hi, __v8hi);
__v8hi __builtin_arc_vbicaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vdifaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vdifw (__v8hi, __v8hi);
__v8hi __builtin_arc_veqw (__v8hi, __v8hi);
__v8hi __builtin_arc_vh264f (__v8hi, __v8hi);
__v8hi __builtin_arc_vh264ft (__v8hi, __v8hi);
__v8hi __builtin_arc_vh264fw (__v8hi, __v8hi);
__v8hi __builtin_arc_vlew (__v8hi, __v8hi);
__v8hi __builtin_arc_vltw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmaxaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmaxw (__v8hi, __v8hi);
__v8hi __builtin_arc_vminaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vminw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr1aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr1w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr2aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr2w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr3aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr3w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr4aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr4w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr5aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr5w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr6aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr6w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr7aw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmr7w (__v8hi, __v8hi);
__v8hi __builtin_arc_vmrb (__v8hi, __v8hi);
__v8hi __builtin_arc_vmulaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmulfaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmulfw (__v8hi, __v8hi);
__v8hi __builtin_arc_vmulw (__v8hi, __v8hi);
__v8hi __builtin_arc_vnew (__v8hi, __v8hi);
__v8hi __builtin_arc_vor (__v8hi, __v8hi);
__v8hi __builtin_arc_vsubaw (__v8hi, __v8hi);
__v8hi __builtin_arc_vsubw (__v8hi, __v8hi);
__v8hi __builtin_arc_vsummw (__v8hi, __v8hi);
__v8hi __builtin_arc_vvc1f (__v8hi, __v8hi);
__v8hi __builtin_arc_vvc1ft (__v8hi, __v8hi);
__v8hi __builtin_arc_vxor (__v8hi, __v8hi);
__v8hi __builtin_arc_vxoraw (__v8hi, __v8hi);
</pre></div>

<p>The following take one <code>__v8hi</code> and one <code>int</code> argument and return a
<code>__v8hi</code> result:
</p>
<div class="example">
<pre class="example">__v8hi __builtin_arc_vbaddw (__v8hi, int);
__v8hi __builtin_arc_vbmaxw (__v8hi, int);
__v8hi __builtin_arc_vbminw (__v8hi, int);
__v8hi __builtin_arc_vbmulaw (__v8hi, int);
__v8hi __builtin_arc_vbmulfw (__v8hi, int);
__v8hi __builtin_arc_vbmulw (__v8hi, int);
__v8hi __builtin_arc_vbrsubw (__v8hi, int);
__v8hi __builtin_arc_vbsubw (__v8hi, int);
</pre></div>

<p>The following take one <code>__v8hi</code> argument and one <code>int</code> argument which
must be a 3-bit compile time constant indicating a register number
I0-I7.  They return a <code>__v8hi</code> result.
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vasrw (__v8hi, const int);
__v8hi __builtin_arc_vsr8 (__v8hi, const int);
__v8hi __builtin_arc_vsr8aw (__v8hi, const int);
</pre></div>

<p>The following take one <code>__v8hi</code> argument and one <code>int</code>
argument which must be a 6-bit compile time constant.  They return a
<code>__v8hi</code> result.
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vasrpwbi (__v8hi, const int);
__v8hi __builtin_arc_vasrrpwbi (__v8hi, const int);
__v8hi __builtin_arc_vasrrwi (__v8hi, const int);
__v8hi __builtin_arc_vasrsrwi (__v8hi, const int);
__v8hi __builtin_arc_vasrwi (__v8hi, const int);
__v8hi __builtin_arc_vsr8awi (__v8hi, const int);
__v8hi __builtin_arc_vsr8i (__v8hi, const int);
</pre></div>

<p>The following take one <code>__v8hi</code> argument and one <code>int</code> argument which
must be a 8-bit compile time constant.  They return a <code>__v8hi</code>
result.
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vd6tapf (__v8hi, const int);
__v8hi __builtin_arc_vmvaw (__v8hi, const int);
__v8hi __builtin_arc_vmvw (__v8hi, const int);
__v8hi __builtin_arc_vmvzw (__v8hi, const int);
</pre></div>

<p>The following take two <code>int</code> arguments, the second of which which
must be a 8-bit compile time constant.  They return a <code>__v8hi</code>
result:
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vmovaw (int, const int);
__v8hi __builtin_arc_vmovw (int, const int);
__v8hi __builtin_arc_vmovzw (int, const int);
</pre></div>

<p>The following take a single <code>__v8hi</code> argument and return a
<code>__v8hi</code> result:
</p><div class="example">
<pre class="example">__v8hi __builtin_arc_vabsaw (__v8hi);
__v8hi __builtin_arc_vabsw (__v8hi);
__v8hi __builtin_arc_vaddsuw (__v8hi);
__v8hi __builtin_arc_vexch1 (__v8hi);
__v8hi __builtin_arc_vexch2 (__v8hi);
__v8hi __builtin_arc_vexch4 (__v8hi);
__v8hi __builtin_arc_vsignw (__v8hi);
__v8hi __builtin_arc_vupbaw (__v8hi);
__v8hi __builtin_arc_vupbw (__v8hi);
__v8hi __builtin_arc_vupsbaw (__v8hi);
__v8hi __builtin_arc_vupsbw (__v8hi);
</pre></div>

<p>The following take two <code>int</code> arguments and return no result:
</p><div class="example">
<pre class="example">void __builtin_arc_vdirun (int, int);
void __builtin_arc_vdorun (int, int);
</pre></div>

<p>The following take two <code>int</code> arguments and return no result.  The
first argument must a 3-bit compile time constant indicating one of
the DR0-DR7 DMA setup channels:
</p><div class="example">
<pre class="example">void __builtin_arc_vdiwr (const int, int);
void __builtin_arc_vdowr (const int, int);
</pre></div>

<p>The following take an <code>int</code> argument and return no result:
</p><div class="example">
<pre class="example">void __builtin_arc_vendrec (int);
void __builtin_arc_vrec (int);
void __builtin_arc_vrecrun (int);
void __builtin_arc_vrun (int);
</pre></div>

<p>The following take a <code>__v8hi</code> argument and two <code>int</code>
arguments and return a <code>__v8hi</code> result.  The second argument must
be a 3-bit compile time constants, indicating one the registers I0-I7,
and the third argument must be an 8-bit compile time constant.
</p>
<p><em>Note:</em> Although the equivalent hardware instructions do not take
an SIMD register as an operand, these builtins overwrite the relevant
bits of the <code>__v8hi</code> register provided as the first argument with
the value loaded from the <code>[Ib, u8]</code> location in the SDM.
</p>
<div class="example">
<pre class="example">__v8hi __builtin_arc_vld32 (__v8hi, const int, const int);
__v8hi __builtin_arc_vld32wh (__v8hi, const int, const int);
__v8hi __builtin_arc_vld32wl (__v8hi, const int, const int);
__v8hi __builtin_arc_vld64 (__v8hi, const int, const int);
</pre></div>

<p>The following take two <code>int</code> arguments and return a <code>__v8hi</code>
result.  The first argument must be a 3-bit compile time constants,
indicating one the registers I0-I7, and the second argument must be an
8-bit compile time constant.
</p>
<div class="example">
<pre class="example">__v8hi __builtin_arc_vld128 (const int, const int);
__v8hi __builtin_arc_vld64w (const int, const int);
</pre></div>

<p>The following take a <code>__v8hi</code> argument and two <code>int</code>
arguments and return no result.  The second argument must be a 3-bit
compile time constants, indicating one the registers I0-I7, and the
third argument must be an 8-bit compile time constant.
</p>
<div class="example">
<pre class="example">void __builtin_arc_vst128 (__v8hi, const int, const int);
void __builtin_arc_vst64 (__v8hi, const int, const int);
</pre></div>

<p>The following take a <code>__v8hi</code> argument and three <code>int</code>
arguments and return no result.  The second argument must be a 3-bit
compile-time constant, identifying the 16-bit sub-register to be
stored, the third argument must be a 3-bit compile time constants,
indicating one the registers I0-I7, and the fourth argument must be an
8-bit compile time constant.
</p>
<div class="example">
<pre class="example">void __builtin_arc_vst16_n (__v8hi, const int, const int, const int);
void __builtin_arc_vst32_n (__v8hi, const int, const int, const int);
</pre></div>

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